CN1115831C - Communication network for transmitting ATM cells over DECT like frame - Google Patents

Communication network for transmitting ATM cells over DECT like frame Download PDF

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Publication number
CN1115831C
CN1115831C CN99800345A CN99800345A CN1115831C CN 1115831 C CN1115831 C CN 1115831C CN 99800345 A CN99800345 A CN 99800345A CN 99800345 A CN99800345 A CN 99800345A CN 1115831 C CN1115831 C CN 1115831C
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CN
China
Prior art keywords
bag
main website
time slot
atm cell
secondarys
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN99800345A
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Chinese (zh)
Other versions
CN1262831A (en
Inventor
G·科珀拉
A·E·萨罗姆萨拉扎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koninklijke Philips NV
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Koninklijke Philips Electronics NV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Publication of CN1262831A publication Critical patent/CN1262831A/en
Application granted granted Critical
Publication of CN1115831C publication Critical patent/CN1115831C/en
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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing
    • H04Q11/0428—Integrated services digital network, i.e. systems for transmission of different types of digitised signals, e.g. speech, data, telecentral, television signals
    • H04Q11/0478—Provisions for broadband connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/54—Store-and-forward switching systems 
    • H04L12/56—Packet switching systems
    • H04L12/5601—Transfer mode dependent, e.g. ATM
    • H04L2012/5603—Access techniques
    • H04L2012/5604—Medium of transmission, e.g. fibre, cable, radio
    • H04L2012/5607—Radio
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/54—Store-and-forward switching systems 
    • H04L12/56—Packet switching systems
    • H04L12/5601—Transfer mode dependent, e.g. ATM
    • H04L2012/5638—Services, e.g. multimedia, GOS, QOS
    • H04L2012/5646—Cell characteristics, e.g. loss, delay, jitter, sequence integrity
    • H04L2012/5649—Cell delay or jitter
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/54—Store-and-forward switching systems 
    • H04L12/56—Packet switching systems
    • H04L12/5601—Transfer mode dependent, e.g. ATM
    • H04L2012/5672—Multiplexing, e.g. coding, scrambling
    • H04L2012/5674—Synchronisation, timing recovery or alignment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/54—Store-and-forward switching systems 
    • H04L12/56—Packet switching systems
    • H04L12/5601—Transfer mode dependent, e.g. ATM
    • H04L2012/5672—Multiplexing, e.g. coding, scrambling
    • H04L2012/5675—Timeslot assignment, e.g. TDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Time-Division Multiplex Systems (AREA)

Abstract

In a multiple access communication network a primary station (2) is coupled to a plurality of secondary stations (4.....18). The secondary stations (4.....18) transmit packets to the primary station in timeslots in a frame. These timeslots are chosen according to the DECT standard. The problem is that it is not possible to transmit 53 bytes ATM cells in an efficient way in the standard DECT packets. According to the present invention, the guard space to deal with the differing transmission delays between several secondary stations and the primary station is reduced. To prevent problems due to the above-mentioned delay differences, the secondary stations (4.....18) comprise compensation means for adjusting the transmission instants of the packets they transmit. By reducing the guard space, it becomes possible to transmit two 53 bytes ATM cells in a double DECT slot, enabling an efficient transmission of ATM cells over a DECT like frame.

Description

Communication network and method thereof by DECT class frame emission ATM cell
Technical field
The present invention relates to the multichannel communication network; described multichannel communication network comprises the main website that is coupled with a plurality of secondarys; a plurality of secondarys are arranged in the bag that is used for launching 804 mark spaces that are included in the effective load data of corresponding time slot carrying; described bag also comprises a plurality of overhead symbol, and described time slot comprises that protection at interval.
The invention still further relates to transmitter, receiver, transmission method and signal.
Background technology
This emission system is seen: etsi standard ETS 300 175-2, and wireless device and system (RadioEquipment and Systems) are (RES); Digital European Cordless Telecommunications (Digital European CordlessTelecommunications) is general-purpose interface (Common Interface) (DECT), second portion: physical layer (Physical layer), the 4th joint: physical layer services (Physical layer services) pp.14-23.
Dect standard has been described the time domain multiplex communication, and in this system, a plurality of secondarys use 480 long time slots to launch data to main website.In 480,32 are used for synchronously, and 64 are used to control purpose.In addition, 60 guard bits be used to prevent to cause owing to transmission delay between different secondarys and the main website is different from the conflict between the bag of different secondarys.Therefore, 324 can be used for transmitting payload.If launch 53 bytes (=424 s') ATM cell, then available 324 is not enough.
Also may use available 800 two cracks to be used for the Payload transmission.Use 424 with this pair of crack emission ATM cell, remain 376 and do not use.This causes use available bandwidth not yet in effect.
Summary of the invention
The purpose of this invention is to provide the communication network described in a kind of opening paragraph, wherein, can transmit 53 byte ATM cell with effective means.
In order to realize described purpose, the invention is characterized in, secondary comprises the package assembling device, the bag of length that has been used to assemble the expansion that comprises two 53 byte ATM cell, in described secondary, comprise delay compensation means, be used to adjust the x time of bag, poor with the delay that compensates between different secondarys and the main website; And described main website comprises a receiver, a measurement mechanism and a transmitter, this receiver is used to receive the described bag that comprises the extended length of two 53 byte ATM cell, this measurement mechanism is used for determining the time of advent of described bag and the deviation between their rated value that this transmitter is used to send the delay compensation information that is drawn by described deviation.
In addition, the invention provides the communication means between a plurality of secondarys and main website, described method comprises by the secondary emission and comprises 804 mark spaces, is used for the bag at the effective load data of corresponding time slot carrying, described bag also comprises a plurality of overhead symbol, described time slot comprises that protection at interval, it is characterized in that, described method comprise the assembling comprise two 53 byte ATM cell expansion the bag of length, described method comprises the x time of adjusting bag, and is poor with the delay that compensates between different secondarys and the main website; This method also comprises the step of the delay compensation information that the step of a step that receives the bag of the described extended length that comprises two 53 byte ATM cell, time of advent of determining described bag and the deviation between their rated value and transmission are drawn by described deviation.
The present invention is based on and recognize: be no more than 12 if protection is reduced at interval, then might do not change the overhead figure place with two cracks two ATM cell of emission.For protection being reduced to 0 at interval, should use delay compensation means.
These delay compensation means were used to select with the moment of symbol transmission to main website, and selection mode is that these symbols just arrive main website in the time slot beginning.If secondary uses this delay compensation means, just can fully shorten guard time, make and can in two cracks, transmit two ATM cell.
The embodiment of the invention is characterised in that the bag after the expansion comprises 32 bit synchronization fields, 64 control fields and 4 crc fields.
By this way, except that the pay(useful) load zone length, resulting bag is identical with the structure of DECT P80 field.Its advantage is and the DECT equipment of making an amendment slightly can be used for main website and secondary.
Description of drawings
With reference now to accompanying drawing, explains the present invention.
Fig. 1 shows and can use LMDS communication network of the present invention;
Fig. 2 shows the usable frequency that LMDS transmits in the 40GHz frequency band;
Fig. 3 shows the uplink frame that uses in transmission system of the present invention;
Fig. 4 shows the bag that comprises two ATM cell that uses in the present invention;
Fig. 5 shows the block diagram of main website of the present invention;
Fig. 6 shows the block diagram of secondary of the present invention.
Embodiment
According to LMDS (local multi-point distribution system) communication network of Fig. 1, main website 2 is surrounded by a plurality of 4......18 of secondary.According to Fig. 1, network is arranged at the 40GHz frequency band moves.For all 4......18 of secondary can both receive, main website 2 uses omnidirectional antenna.The 4......18 of secondary uses directional antenna usually so that receive maximum signal level from main website 2.
Perhaps, for anti-stop signal is transmitted into beyond the coverage, also main website may be placed on the edge of coverage and may use directional antenna.The signal that this or reduction adjacent unit are launched causes and can reuse given frequency in the distance in being shorter than the system that uses omnidirectional antenna.
Fig. 2 shows the frequency band that uses in the communication system of the present invention.Concerning the LMDS system, the total frequency band range available in Europe is from 40.5GHz to 42.5GHz.The frequency band of this 2GHz is divided into the frequency band of 2 1GHz.Each 1GHz frequency band is divided into the uplink frequency band of 50MHz bandwidth and the down-path frequency band of 950MHz.The uplink frequency band of 50MHz comprises 22 carrier waves that are spaced apart 2.2MHz.Each carrier wave can be the GMSK with the 1152kbit/sec bit-rate modulation.This is identical with the channel architecture that uses in DECT cordless telephone standard.
Fig. 3 shows the uplink frame that uses on each carrier wave of 22 carrier waves of Fig. 2.The duration of uplink frame is 10ms, comprises 12 two cracks.Each two crack can be carried 960.
Fig. 4 shows the structure of the uplink bag that can launch in two cracks shown in Figure 3 one.It begins with 32 synchronization field (field) S, and the back and then is used for the 64A-field of emission control information.After 64 A-fields, follow two 53 byte ATM cell of carrying payload.After atm cell, add the 4CRC position.These CRC positions are used for determining whether the bag of secondary emission is correctly received.Last 12 of frame are not used in the emission data.They are as the protection interval, to prevent making two bags from different secondarys subsequently overlapping owing to transmission delay is different.
In according to main website shown in Figure 5, antenna is connected to a terminal of duplexer 83.The output of duplexer 83 connects the input of demodulator 81.The output of demodulator 81 connects measuring component 79 and bale breaker 77.
Measuring component 79 is used for measuring the time of advent of wrapping at time slot and signals to measurement mechanism 79 by controller 75 simultaneously.Compared with the rated value of the time of advent time of advent of the bag that records, their difference is sent to controller 75.Difference is included in the control information and is sent to packing device 71, and packing device 71 comprises and is used for secondary, has poor in the bag of bag of measurement time of advent of being launched.
Bale breaker 77 extracts ATM cell from the bag that receives, and they are delivered to its output.The ATM cell that will be transmitted into one of them secondary is added to the input of packing device 71.Packing device 71 makes up the bag that is transmitted into secondary according to Fig. 4.Packing device 71 also makes up the bag to the secondary emissioning controling signal.Packing device 71 constructed bags pass to modulator, its input signal on the modulators modulate transmission carrier wave.The output signal of modulator 73 passes to antenna through duplexer 83.
In secondary, antenna is coupled to the I/O of duplexer 91 according to Fig. 6.The output of duplexer 91 connects the input of demodulator 93, the signal that demodulator 93 demodulation receive from duplexer 93.The output of demodulator 93 connects the input of bale breaker 95.Bale breaker 95 extracts ATM cell and they is reached its output from its input signal.Bale breaker 95 also extracts the secondary control information from its input signal, and they are reached the input of controller 97.An example of control information is the delay compensation information of determining in main website.
Be added to the input of packing device 103 by the ATM cell of secondary emission.Packing device 103 comprise according to Fig. 4 form enter the bag in ATM cell.Reach the input of controllable delay element 101 from the bag of packing device 103.Controllable delay element 101 receives the delay compensation information that receives from main website, utilizes this information setting length of delay, makes that in the time of the bag arrival main website that launches be rated value.The output signal of controllable delay element 101 is added to the input of modulator 99, the output signal of the controllable delay element 101 of modulator 99 modulation transmissions to the carrier wave of main website.The output of modulator 99 connects the input of duplexer 91, and the signal after duplexer 91 will be modulated is added to it is transmitted on the antenna of main website.

Claims (7)

1. multichannel communication network, comprise the main website that is coupled with a plurality of secondarys, a plurality of secondarys are arranged in the bag that is used for launching 804 mark spaces that are included in the effective load data of corresponding time slot carrying, described bag also comprises a plurality of overhead symbol, described time slot comprises that protection at interval, it is characterized in that, described secondary comprises the package assembling device, be used to assemble the bag of the extended length that comprises two 53 byte ATM cell, in described secondary, comprise delay compensation means, be used to adjust the x time of bag, poor with the delay that compensates between different secondarys and the main website; And described main website comprises a receiver, a measurement mechanism and a transmitter, this receiver is used to receive the described bag that comprises the extended length of two 53 byte ATM cell, this measurement mechanism is used for determining the time of advent of described bag and the deviation between their rated value that this transmitter is used to send the delay compensation information that is drawn by described deviation.
2. communication network according to claim 1 is characterized in that, the bag after the expansion comprises 32 bit synchronization fields, 64 control fields and 4 crc fields.
3. the main website that is used for multichannel communication; described main website comprises receiver; be used for receiving 804 mark spaces that are included in the effective load data of corresponding time slot carrying; described bag also comprises a plurality of overhead symbol; described time slot comprises that protection at interval; it is characterized in that; described receiver has been arranged to receive the expansion that comprises two the 53 byte ATM cell bag of length; described main website comprises the time of advent of definite bag and the measurement mechanism of its rated value deviation; main website also comprises transmitter, is used to launch the delay compensation information that comes from described deviation.
4. main website according to claim 3 is characterized in that, the bag after the expansion comprises 32 bit synchronization fields, 64 control fields and 4 crc fields.
5. the secondary that is used for the multichannel communication network; described secondary is arranged to be used for launching the bag that comprises 804 mark spaces, carries effective load data in corresponding time slot; described bag also comprises a plurality of overhead symbol; described time slot comprises that protection at interval; it is characterized in that; described secondary comprises the package assembling device; the bag of length that has been used to assemble the expansion that comprises two 53 byte ATM cell; in described secondary, comprise delay compensation means; be used to adjust the x time of bag, poor with the delay that compensates between different secondarys and the main website.
6. secondary according to claim 5 is characterized in that, the bag after the expansion comprises 32 bit synchronization fields, 64 control fields and 4 crc fields.
7. the communication means between a plurality of secondarys and main website, described method comprises by the secondary emission and comprises 804 mark spaces, is used for the bag at the effective load data of corresponding time slot carrying, described bag also comprises a plurality of overhead symbol, described time slot comprises that protection at interval, it is characterized in that, described method comprise assembling comprise two 53 byte ATM cell expansion the bag of length, described method comprises the x time of adjusting bag, and is poor with the delay that compensates between different secondarys and the main website; This method also comprises the step of the delay compensation information that the step of a step that receives the bag of the described extended length that comprises two 53 byte ATM cell, time of advent of determining described bag and the deviation between their rated value and transmission are drawn by described deviation.
CN99800345A 1998-03-26 1999-03-11 Communication network for transmitting ATM cells over DECT like frame Expired - Fee Related CN1115831C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP98200932.6 1998-03-26
EP98200932 1998-03-26

Publications (2)

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CN1262831A CN1262831A (en) 2000-08-09
CN1115831C true CN1115831C (en) 2003-07-23

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CN99800345A Expired - Fee Related CN1115831C (en) 1998-03-26 1999-03-11 Communication network for transmitting ATM cells over DECT like frame

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US (1) US6621819B1 (en)
EP (1) EP0985300A2 (en)
JP (1) JP2002512765A (en)
KR (1) KR20010013030A (en)
CN (1) CN1115831C (en)
WO (1) WO1999049625A2 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9679602B2 (en) 2006-06-14 2017-06-13 Seagate Technology Llc Disc drive circuitry swap
US9305590B2 (en) 2007-10-16 2016-04-05 Seagate Technology Llc Prevent data storage device circuitry swap
US9379833B2 (en) * 2011-11-09 2016-06-28 Nec Corporation Transmitter, transmission method, and non-transitory computer-readable medium storing program
US9398490B2 (en) * 2013-03-15 2016-07-19 Trane International Inc. Method of fragmenting a message in a network

Family Cites Families (11)

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Publication number Priority date Publication date Assignee Title
US5347562A (en) * 1989-08-18 1994-09-13 Hutchinson Personal Communications Limited Synchronizing groups of base stations in time division duplex communication systems
US5422887A (en) * 1991-11-27 1995-06-06 Ncr Corporation Medium access protocol for wireless local area network
EP0769230A2 (en) * 1995-05-04 1997-04-23 Koninklijke Philips Electronics N.V. Telecommunication network with improved access protocol
US5717689A (en) * 1995-10-10 1998-02-10 Lucent Technologies Inc. Data link layer protocol for transport of ATM cells over a wireless link
US5666366A (en) * 1996-05-24 1997-09-09 National Semiconductor Corporation Inter-base synchronization technique for a TDMA communication system
US6014767A (en) * 1996-09-04 2000-01-11 International Business Machines Corporation Method and apparatus for a simple calculation of CRC-10
FI964047A (en) * 1996-10-09 1998-04-10 Nokia Telecommunications Oy Communication method and base station system
NL1004458C2 (en) * 1996-11-06 1998-05-08 Nederland Ptt Method for the transmission of DECT frames.
EP0851608A1 (en) * 1996-12-31 1998-07-01 TELEFONAKTIEBOLAGET L M ERICSSON (publ) Transmission time delay measurement at transmission paths in a radio telecommunication system
US6501771B2 (en) * 1997-02-11 2002-12-31 At&T Wireless Services, Inc. Delay compensation
GB9709285D0 (en) * 1997-05-08 1997-06-25 Philips Electronics Nv Flexible two-way telecommunications system

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Publication number Publication date
JP2002512765A (en) 2002-04-23
EP0985300A2 (en) 2000-03-15
CN1262831A (en) 2000-08-09
WO1999049625A2 (en) 1999-09-30
KR20010013030A (en) 2001-02-26
WO1999049625A3 (en) 1999-12-09
US6621819B1 (en) 2003-09-16

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